who is alexander graham bell how did he change the world ?
Alexander Graham Bell was a Scottish-born inventor, scientist, and engineer who is best known for inventing the first practical telephone. He was born in Edinburgh, Scotland, on March 3, 1847, and moved to Canada with his family in 1870. Bell was interested in inventing new technologies, including the telephone, the photophone, and the metal detector. Bell is credited with many other inventions, including the metal detector, the audiometer, and the phonautograph. Bell died on August 2, 1922, in Bad Nau A audiometer is a device used to measure hearing loss in humans. A photophone is a device that allows the transmission of sound over a distance by modulating light waves. A metal detector is a device that detects the presence of metal objects in the ground. A phonautograph is a device that